Projector.



R. L.l CARLSON & R. C. VVYIIIIAIII.

PHOJECTGR.

APPLICATION FILED FEB. 4` I9I6.

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w M W w R. L. CARLSON 6L R. C. WYIVIAN.A

PROJECTOR.

APPLlcATIoN FILED FEB. 4. |916.

Lww. Patenmug. 29,1916.

3 SHEETS-SHEET 2.

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R. L. CARLSONl L C. WYIVIAN.

PROJECTOR.

APPLICATION FILED FEB. 4. 1916.

` 1111,[11111911 Aug. 29, 1916.

3 SHEETS-SHEET 3.

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Specification of Letters Patent.

Patented Aug. 29., fmt@ Application led February 4, 1916. l Serial No.76,485.

To all whom z' 'may concern Be it known that we, ROBERT la. CARLSON andRAYMOND C. WYMAN, citizens of the United States of America, andresidents of Boston, in the county of Suolk and State of Massachusetts,have invented certain new and useful improvements in Projectors, ofwhich the following is a specification.

The invention relates to devices for projecting pictures on screens andhas forits object the production of a simple and effective apparatus ofthis character adapted es-` pecially to be used for advertisingpurposes, and for use in motion picture theaters while the motionpicture machine is being permitted to cool.

The invention consists primarily of a revoluble drum having tW-o seriesof lantern slides on its periphery, said drum being adapted to rotateintermittently and during the nonrotating periods to be shifted endwisethereby to cause the various slides in both series to be broughtalternately into alinement with the projecting means.

The invention further consists in mechanism for extinguishing the lampduring the variousjmovements of" said drum.

'll`he invention further consists in a novel means for reciprocating thedrum endwise.

rllhe invention further consists in certain novel features ofconstruction and arrangement of parts which will be fully understood byreference to the description of the drawings and to the claimshereinafter given.

0f the drawings: Figure 1 represents a horizontalsection of an apparatusembodying the principles of the present invention. Fig. 2 represents avertical section of the same, the cutting plane being on line 2-2 onFig. 1. Fig. 3 represents a horizontal section of the same on line 3 3on Fig. 2. Fig. 4 represents a horizontal section of the same on line4-4 on Fig. 2. Fig. 5 represents a vertical section of the same on line5--5 on Fig. 1, and Fig. 6 represents a diagram showing the wiringconnecting the various electrical devices thereof.

Similar characters designate like parts throughout .the several figuresof the drawings.

In the drawings, 10 is a casing having secured to one side thereof abracket 11 supporting a projecting lens 12 of any wellknownconstruction, the mounting for said lens projecting through the sidewall of the casing as indicated in Figs. l, 2, and 5 of "the drawings.'llo the inner-wall of the casing 10 is secured another bracket 13having mounted therein a second lens 14 in alinement with the lens 12.As the lenses 12 and 14 and the mountings therefor are of anyTwell-known construction, they are not illustrated in detail, but aresimply shown in elevation. 0n the bottom 10a of the casing 10 are twogrooved tracks 15 and 16 in the grooves of which are mounted a pluralityof balls or other anti-friction members 17. Supported 0n the balls 17 isa -platform or carriage `18 ladapted for movement transversely of thecasing 10. Secured to this platform for carriage 18` is a fra-mework'19consisting of two. rectangular side frames connected by 'a plurality ofrods 20. Between the side frames of the framework 19 are a plurality ofrevoluble disks or rollers 21 adapted to rotate freely about the rods20. Supportedvby the rollers 21 are two annular members 22 connectedtogether by means of grooved strips 23 and forming a revoluble drumadapted to be rotated about its axis by means to be hereinafterdescribed. The axis of said drum is perpendicular to the optical axis ofthe lenses 12 and 14. lin thev grooves of the strips 23 are mounted aplurality of lantern slides 24, said lantern slides being in two series,side by side, ,each series preferably containing an odd number ofslides.

Mounted upon the platform or carriage 18 is an electric motor 25 towhich current is conducted through the wires 26 connected withthe\binding posts 27. This motor may be of any\wellknown construction,and is provided withaerrevoluble pinion 28 meshing with the gear 29 upona shaft 30 revoluble in bearings 31 in a bracket 32 secured to saidplatform or carriage 18. The inner end of the shaft 30 has securedthereto a bevel pinion 33 meshing with a bevel gear 34 secured to andrevoluble with a vertical shaft 35 mounted in a bearing formed upon thebracket 32 and having secured to its lower end a lever 36 the outer endof which is provided with an arcuate bearing surface `37. When the motor25 is in operation the lever 36 is moved -in'the direction of the arrowa. Secured to the bottom 10EL are two obstructions 3,8a and 38b in thepath of the arcuate end 37 of the lever 36. The lever 36 moves freely in,the direction of the arrow a until the end 39 of the arc portionthereof comes into contact with the obstruction 38a, as indicated inFig. 3 of the drawings. When the end 39 comes into contact with the ob-`will be in contact with the curved surface .40

of a cam member 41 secured to the bottom 10a of the casing 10. When theend 39 contacts with the obstruction 38a the rear end k42 of the arcportion of the lever 36 will reach the highest portion 43 of the cammember 41, and as the shaft 35 begins to move in the direction of thearrow b this end 42 will travel along the curved surface 44 of the cammember 41 untilthe end 39 reaches the curved end 45 of the obstruction38a, at which time the lever 36 will again be free to move withoutobstruction. Before the rear end 42 of the arc portion 37 of the lever36 is free from contact with the curved surface 45 of the stop member38, the forward portion of said bearing surface 37 will coact with thecurved surface 46 of the cam member 47 secured to the bottom10a of thecasing 10. This bearing surface Vwill then remain in contact with thecurved surface 46 until the forward end 39 of the lever 36 contacts withthe obstruction 38h, at which time the rear end 42 will have reached thehighest point 48 of the said cam member 47 and the lever 36'will beagain rocked about the end 39 as a fulcrum, thus causing the shaft 35 tobe moved in a direction opposite to that indicated by the arrow Z)on-Fig. 3 of the drawings. During this latter movement the rear end 42of the arc portion of the lever 36 will travel along the cam surface 49of said cam member 47 until the end 39 reaches the curved portion 50 ofthe obstruction 38", and then the lever 36 will be free to move aboutthe axis of the shaft 35 until the end 39 thereof again contacts withthe obstruction 38%. By means of this construction the platform orcarriage 18 is reciprocated transversely of the casing 10 andremains ata standstill at the end of its movement in either direction. By means ofthe arcuate bearing surface 37 contacting with the curved cam surfaces40, 44, 46, and 49, of the cam members 41 and 47, and the curvedsurfaces 45and 50 of the obstructions 38 and 38", there can be nolateral movement of the platform 18 when said platform reaches the endof its movement in either direction. This is of considerable importance,for while the platform is at rest it is intended that the picture uponone of the lantern slides 24 should be projected through the lenses 12and 14 upon a screen of any well-known construction, and obviously itisl essential that there should be no slight movement or vibration ofthe platform while the picture is being projected. To further limit themovement of the carriage 18 in either direction, the bottom 10a hassecured thereto a plurality of blocks or stop members 51 in the path ofprojections 52 extending downwardly from the bottom of saidreciprocating carriage 18. At the opposite ends of the platform 18 aresecured downwardly extending plates 53 the inner faces of which contactwith the balls or antifriction meinbers 17 and cause them to move alongtle tracks 15, 16 as the platform 18 reciprocates transversely of thecasing 10. The shaft 30 has also secured thereon a bevel gear 54 meshingwith a bevel gear 55 secured to a shaft 56 perpendicular to the shaft 30and revoluble in the hearings in a support 57 secured to the platform18. The opposite end of the shaft 57 has Secured thereto a sprocketwheel 58 from which power is transmitted through an endless sprocketchain 59 to a sprocket wheel 60 mounted upon a shaft 61 revolublymounted in a support 62 secured to the platform 18.

Secured to the inner end of the shaft 61 is a disk 63 having a cam path64 in the outer face thereof. Pivoted at 65 to the member 62 is a lever66 having a projection 67 thereon extending into the groove 64. Theupper end .of the lever 66 is provided with a projection 68 which isadapted when said lever is moved to the right of F ig. 2 to enter theslots 69 between projections 70 extending outwardly from the face of oneof the annular members 22. The cam disk 63 has projecting from its innerface a pin 71 which as said cam disk 63 revolves enters one of the slots69 and bearing against a projection 70 moves the drum 22-23 about itsaxis a predetermined distance. This distance is suiiicient to carry thecenter of one lantern slide 24 out of the optical axis of the lenses12-14 and the center of a succeeding lantern slide into said opticalaxis. As the pin 71 leaves the slot 69 the cam throw of the groove 64will act upon the I lever 66 to move the projection 68 1nto another slot69 and lock the drum from further rotation until the pin 71 in itsmovement about the axis of the shaft 61 engages the next succeedingprojection 70 when the lever 66 will be moved to the left of Fig. 2 ofthe drawings and permit the rotation of said drum. a. predetermineddistance by said pin 71. On the end of the lever 66 is a contact member72 adapted to engage another contact member 63 secured to the frame 19.The contact member 72 is electrically connected to a wire 74 and thecontact member 73 is electrically connected to another wire 75.

Within the revoluble drum 22-23 is positioned an electric lamp 76 ofhigh power, this lamp being secured to one wall of the casing 10 bymeans of a socket 77. From the lamp 76 extends a wire 75 to the contact73 while another wire 78 extends therefrom to a wire 79 connected withthe dynamo 80 or other source of electric energy. rThis wire 79 alsoconnects with one of the wires 26 to the motor, while the other wire 26from the motor `is connected to a wire 81 leading to the dynamo or othersource of energy. rllhe wire 74 also connects with the wire 81. lin thewire 26 is a e vitch 82 by which the circuit may be brokerI when it is.

desired to stop the motor 25. When the switch 82 is closed the electriccurrent will pass from the dynamo 80 to the motor 25 and operate thelatter. When contact is made between themembers 72 and 73 the electriccurrent will pass through the wires 74, 75, and 7 8 to the lamp 76 andlight the same. It is obvious from an inspection of Fig. 2 of thedrawings that when the drum 22-23 is being rotated, the contact betweenthe members 7 2-7 3 will be broken, and the lamp 76 will beextinguished. When a slide has been projected a predetermined period thelamp will be extinguished before that Islide is moved out of the opticalaxis of the 4lenses 12 and 14 and a new slide will be drum so' that irsta lantern slide in one series will be projected and then a lantern slidein the other series will b e projected. By this means in the first cycleoi the drum 22-23 every other lantern slide in the two series will bealternately projected, and owing to the fact that there is an odd numberof slides in 'each series, when the second cycle of the drum occurs theslidesin the two series not previously exposed will be projectedalternately upon the screen. 1t is obvious, therefore, that when themotor 25 is in operation that in two cycles of the revoluble drum 22-23all of theflantern slides carried by said drum will be automaticallyexposed. After two vcyclesof the drum the operation will automaticallybe repeated and the same slides will again be projected unless the.operator opens the switch 82 to stop the motor 25.

The device is particularly adapted for advertising purposes, but maybeused in vmany other ways, as for instance, in motion picture houseswhere pictures may be thrown upon the screen by means of this projectorwhile the reels in the moving picture apparatus are being changed. r

It is believed that the operation and many advantages of the inventionwill be fully apparent without further description.

Having thus described our invention, we claim:

1. 1n a device of the class described, the combination of projectingmeans; a revoluble drum; a plurality of series of lantern slides carriedthereby; a lamp wit-hin said drum; means for intermittently rotatingsaid drum; and means for moving said drum endwise to bring either seriesof slides in the plane of said lamp and projecting means.

2. 1n a device of the class described, the combination of projectingmeans; a revoluble drum; a plurality of series of lantern slides carriedthereby, each series having an odd number of slides therein; a lampwithin said drum; means for intermittently rotating said drum; and meansfor moving said drum endwise to bring alternately either series ofslides in the plane of said lamp and projecting means.

3. In a device of the class described, the combination of projectingmeans; a revoluble drum; a plurality of series of lantern slides carriedthereby; a lamp within said drum; means for intermittently rotating saiddrum; means for moving said drum endwise to bring either series ofslides in the plane of said lamp and projecting means; and means for.extinguishing said lamp during the end movement of said drum.

4. In a device of the class described, the combination of a revolubledrum; a plurality of series of lantern slides carried thereby; a lampwithin said drum; a projecting lens alined with said lamp, `a condensinglens withinF said drum and in alinement with said projecting lens; meansfor intermittently rotating said drum; and means for moving said drumlaterally whereby either series of slides may be brought into the planeof said lamp and lenses.

5. 1n a device of the class described, the combination of a revolubledrum; a plurality ot series of lantern slides carried thereby; a lampwithin said drum; a projecting lens alined with saidhlamp, a condensinglens within said druml and in alinement with said projecting lens; meansfor intermittently rotating said drum; means for moving said drumlaterally whereby either series of slides may be brought into the planeof said lamp and lenses; and means for extinguishing said lamp duringthe lateral movements of said drum.

6. In a device of the class describeda the combination of a casing; aylens in thef'ewall thereof; a carriage movable perpendicularly to theaxis of said lens; a framework thereon; a drum revolubly mounted in saidframework; means thereon for supporting a plurality of lantern slidesinv two series; a lens within said drum alined with said casing lens; alamp within said drum; means for rotating said drum intermittently;and,means for moving said carriagel to bring either series of slidesinthe plane of said lamp and lenses. v

7. In a device of the class described, the combination of a casing; alens in the wall thereof; la carriage movable perpendicularly to theaxis of said lens; a framework thereon; a drum revolubly mounted in saidframework; means thereon for supporting a vplurality of lantern slidesin two series; a lens within said drum alined with said casing lens; alamp within said drum;

means for rotating said drum intermittently; means for moving saidcarriage to bring either series of slides in the plane of said slamp andlenses; and means for automatically extinguishing said lamp during 'themovements of said drum.`

8./ In a device of the class described, the combination of a casing; alens in the wall thereof; a carriage movable perpendicularly to the axisof said lens; a framework thereon; a drum revolubly mounted in saidframework; m'eans thereon for supporting a plurality of lantern slidesin two series; a lens within said drum alined with said casing lens; alamp within said drum;

means for rotating said drum intermit tently; andmeans for moving saidcarriage to bring either series of slides alternately in the plane ofsaid lamp and lenses.

9. In a device of the class described, the combination' of projectingmeans; a slidable framework; a `plurality of rollers thereon;

s two revoluble annular disks supported lby said rollers; stripsconnecting said disks and adapted to support a plurality of series ofllantern slides; a lamp within the path of movement of said slidesalined with said projecting means; and means for rotating said disks;and means for moving said framework to bring either series of slidesinto theline of projection. l

10. In a device ofthe class described, the

Aicombination of projecting means; a slidable framework; "a plurality ofrollers thereon; ytwo revoluble annular disks supported by said rollers;strips connecting said disks and adapted to support a plurality f seriesof lantern slides; a lamp within the path of movement of said slides andalined with said projecting means; a plurality of spaced projections onone of said disks; a revoluble member; a finger thereon adapted at eachrevolution of said member to coact with one of said projections androtate said disk a limited amount; and means -for moving said frameworkto bring either series of slides into the line of projection.

11. In a device of the class described, the combination of projectingmeans; a slidable framework; a plurality of rollers thereon; tworevoluble annular disks supported by said rollers; strips connecting'said disks and adapted to support a plurality of series of lanternslides; a lamp within the path of movement of said slides and alinedwith said projecting means; a plurality of spaced projections on one ofsaid disks; a revoluble member; a finger thereon adapted at cachrevolution of said member to coact with one of` said projections androtate said disk a limited amount; a switch for controlling said lampoperable by said revoluble member; and.means for moving said frameworkto bring either series of slides into the line of projection.

12. In a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means; arevoluble shaft extending through said platform; means for rotating saidshaft; a lever on the lower end of said shaft;

and fixed obstructions in the path of the outer end of said lever.

13. In a device of the class described, the

combination of projecting means; a platform movable relatively thereto;a revoluble lantern-'slide-carrying drum mounted thereon and movabletherewith; a fixed lamp within said drumalined with said projectingmeans; a revoluble shaft extending through said platform; means forrotating said -outer end of said lever; a plurality of fixed stops; andprojections on the under side of said platform adapted toengage saidstops through and limit the movement of said platform in eitherdirection.

15. ln a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means; arevoluble shaft extending through said platform; means for rotating saidshaft; a lever' on the lower end of said shaft having an arcuate bearingsurface at its outer end; fixed obstructions in the path of the outerend of said lever; and fixed members having cam surfaces adapted tocoact with said bearing surfaces when said lever is in engagement withsaid fixed obstructions.

16. In a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means; arevoluble shaft extending through said platform; means for rotating saidshaft; a lever on the lower end of said shaft; and means disconnectedfrom said lever but coacting therewith to impart reciprocatory movementto said platform during the rotation of said shaft.

17. In a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means; arevoluble shaft extending through said platform; means for rotating saidshaft mounted on said platform; a lever on the lower end of said shaft;and means disconnected from said lever but coacting therewith to impartreciprocatory movement to said platform during the rotation of saidshaft. i

18. lln a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means;a`revoluble shaft extending through said platform; means for rotatingsaid shaft; a lever on the lower end of said shaft; means disconnectedfrom said lever but coacting therewith to impart reciprocatory movementto said platform during the rotation of said shaft; and means connectedwith said shaft-rotating-means for intermittently revolving said drum.

19. In a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means; means forreciprocating said platform including a motor mounted upon saidplatform; a plurality of spaced projections on said drum; and arevoluble member provided with a lateral pin adapted to engage saidprojections successively during the rotation of said member.

20. In a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means; means forreciprocating said platform including a motor mounted upon saidplatform; a plurality of spaced projections on said drum; a revolublemember provided with'a lateral pin adapted to engage said projectionssuccessively during the 'rotation of said member; and means driven bysaid motor for rotating said revoluble member.

21. In a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; afixed lamp within said drum alined with said projecting means; means forreciprocating 'said platform including a motor mounted upon saidplatform; a plurality of spaced projections on said drum; a revolublemember provided with a lateral pin adapted to engage said projectionssuccessively during the rotation of said member V and having a camsurface thereon; a pivoted lever contacting with said cam surface andmovable thereby about its pivot; and a switch for controlling said lampactuated by the movements of said lever.

22. ln a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; 'afixed lamp within said .drum alined with said projecting means; meansfor reciprocating said platform including a. motor mounted upon saidplatform; a plurality of spaced projections on said drum; a vrevolublemember provided with a lateral pin adapted to engage said projectionssuccessively during the rotation of said member and having a cam groovetherein; a pvoted lever having a projecting stud in said groove andmovable thereby about its pivot; and a switch for controlling said lampactuated by the movements of said lever.

23. lfn a device of the class described, the combination of projectingmeans; a platform movable relatively thereto; a revolublelantern-slide-carrying drum mounted thereon and movable therewith; a xedlamp Within said drum alined With said projectstraining said drum fromrotary movement 10 ing means; means for reciprocating said atpredetermined times. platform including a motor mounted upon Signed byus at 4 Post Oice Sq., Boston, said platform; a plurality of spaced pro-Mass., this 26th day of January, 1916.

5 jections on said drum; a revoluble member ROBERT LACARLSON.

provided With a lateral pin adapted to en- RAYMOND C. WYMAN. gage saidprojections successively during the Witnesses: rotation of said member;and means con- WALTER E. LOMBARD,

trolled by said revoluble member for re- NATHAN C. LOMBARD.

